Home / 20,821.46-31,205.37-7,658.24

Finding the Fourth Proportional to 20,821.46, 31,205.37 and 7,658.24

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Solution

The fourth proportional to 20,821.46, 31,205.37 and 7,658.24 is: 11,477.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.46 : 31,205.37 = 7,658.24 : x
  2. Step 2: Convert to fraction form
    20,821.46/31,205.37 = 7,658.24/x
  3. Step 3: Cross multiply
    20,821.46x = 31,205.37 × 7,658.24
  4. Step 4: Simplify right side
    20,821.46x = 238,978,212.75
  5. Step 5: Solve for x
    x = 238,978,212.75/20,821.46
  6. Step 6: Final answer
    x = 11,477.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.